We've been working on porting our (http://www.littleheroes.com) kids books to the iPad - and now we've done that:

http://itunes.apple.com/us/app/little-heroes/id477247738?ls=1&mt=8

The app itself is free, each story is $4.99 as an in-app purchase. We've elected to keep our stories just that - stories. No moving parts, no audio, no animation etc.

Would love to hear feedback, suggestions, complaints etc.